diff --git a/examples/popup.css b/examples/popup.css
index ddcde8dc4e..2f134d5dc2 100644
--- a/examples/popup.css
+++ b/examples/popup.css
@@ -8,6 +8,7 @@
   border: 1px solid #cccccc;
   bottom: 12px;
   left: -50px;
+  min-width: 280px;
 }
 .ol-popup:after, .ol-popup:before {
   top: 100%;